Coffee grinder



FIG. 1 is a front perspective view for a coffee grinder showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left-side view thereof; and,

FIG. 8 is a right-side view thereof.

In the drawings, the lightest gray depicts portions of the coffee grinder that form no part of the claimed design. 

CLAIM The ornamental design for a coffee grinder, as shown and described. 